1664007724326 has 8 divisors (see below), whose sum is σ = 3328015448664. Its totient is φ = 554669241440.

The previous prime is 1664007724273. The next prime is 1664007724361. The reversal of 1664007724326 is 6234277004661.

It is a sphenic number, since it is the product of 3 distinct primes.

1664007724326 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138667310355 + ... + 138667310366.

It is an arithmetic number, because the mean of its divisors is an integer number (416001931083).

Almost surely, 2^{1664007724326} is an apocalyptic number.

1664007724326 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664007724326 is a wasteful number, since it uses less digits than its factorization.

1664007724326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277334620726.

The product of its (nonzero) digits is 2032128, while the sum is 48.

The spelling of 1664007724326 in words is "one trillion, six hundred sixty-four billion, seven million, seven hundred twenty-four thousand, three hundred twenty-six".